{"id":"https://openalex.org/W2074131389","doi":"https://doi.org/10.1109/is.2012.6335218","title":"Application of intuitionistic fuzzy sets for more objective comparison of Kaplan-Meier curves","display_name":"Application of intuitionistic fuzzy sets for more objective comparison of Kaplan-Meier curves","publication_year":2012,"publication_date":"2012-09-01","ids":{"openalex":"https://openalex.org/W2074131389","doi":"https://doi.org/10.1109/is.2012.6335218","mag":"2074131389"},"language":"en","primary_location":{"id":"doi:10.1109/is.2012.6335218","is_oa":false,"landing_page_url":"https://doi.org/10.1109/is.2012.6335218","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 6th IEEE INTERNATIONAL CONFERENCE INTELLIGENT SYSTEMS","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5039894684","display_name":"Lyudmila Todorova","orcid":"https://orcid.org/0000-0003-1496-9982"},"institutions":[{"id":"https://openalex.org/I4210103918","display_name":"Institute of Biophysics and Biomedical Engineering","ror":"https://ror.org/01dxqkr82","country_code":"BG","type":"facility","lineage":["https://openalex.org/I24768866","https://openalex.org/I4210103918"]},{"id":"https://openalex.org/I24768866","display_name":"Bulgarian Academy of Sciences","ror":"https://ror.org/01x8hew03","country_code":"BG","type":"funder","lineage":["https://openalex.org/I24768866"]}],"countries":["BG"],"is_corresponding":true,"raw_author_name":"Ludmila Todorova","raw_affiliation_strings":["Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria","Institute of Biophysics and Biomedical Engineering; Bulgarian Academy of Sciences; 1113 Sofia; Bulgaria"],"affiliations":[{"raw_affiliation_string":"Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria","institution_ids":["https://openalex.org/I24768866","https://openalex.org/I4210103918"]},{"raw_affiliation_string":"Institute of Biophysics and Biomedical Engineering; Bulgarian Academy of Sciences; 1113 Sofia; Bulgaria","institution_ids":["https://openalex.org/I24768866","https://openalex.org/I4210103918"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5047864176","display_name":"Peter Vassilev","orcid":"https://orcid.org/0000-0002-7361-9272"},"institutions":[{"id":"https://openalex.org/I4210103918","display_name":"Institute of Biophysics and Biomedical Engineering","ror":"https://ror.org/01dxqkr82","country_code":"BG","type":"facility","lineage":["https://openalex.org/I24768866","https://openalex.org/I4210103918"]},{"id":"https://openalex.org/I24768866","display_name":"Bulgarian Academy of Sciences","ror":"https://ror.org/01x8hew03","country_code":"BG","type":"funder","lineage":["https://openalex.org/I24768866"]}],"countries":["BG"],"is_corresponding":false,"raw_author_name":"Peter Vassilev","raw_affiliation_strings":["Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria","Institute of Biophysics and Biomedical Engineering; Bulgarian Academy of Sciences; 1113 Sofia; Bulgaria"],"affiliations":[{"raw_affiliation_string":"Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria","institution_ids":["https://openalex.org/I24768866","https://openalex.org/I4210103918"]},{"raw_affiliation_string":"Institute of Biophysics and Biomedical Engineering; Bulgarian Academy of Sciences; 1113 Sofia; Bulgaria","institution_ids":["https://openalex.org/I24768866","https://openalex.org/I4210103918"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5086519740","display_name":"Peter Hadjistoykov","orcid":null},"institutions":[{"id":"https://openalex.org/I4210103918","display_name":"Institute of Biophysics and Biomedical Engineering","ror":"https://ror.org/01dxqkr82","country_code":"BG","type":"facility","lineage":["https://openalex.org/I24768866","https://openalex.org/I4210103918"]},{"id":"https://openalex.org/I24768866","display_name":"Bulgarian Academy of Sciences","ror":"https://ror.org/01x8hew03","country_code":"BG","type":"funder","lineage":["https://openalex.org/I24768866"]}],"countries":["BG"],"is_corresponding":false,"raw_author_name":"Peter Hadjistoykov","raw_affiliation_strings":["Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria","Institute of Biophysics and Biomedical Engineering; Bulgarian Academy of Sciences; 1113 Sofia; Bulgaria"],"affiliations":[{"raw_affiliation_string":"Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria","institution_ids":["https://openalex.org/I24768866","https://openalex.org/I4210103918"]},{"raw_affiliation_string":"Institute of Biophysics and Biomedical Engineering; Bulgarian Academy of Sciences; 1113 Sofia; Bulgaria","institution_ids":["https://openalex.org/I24768866","https://openalex.org/I4210103918"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5110843154","display_name":"Jivko Surchev","orcid":null},"institutions":[{"id":"https://openalex.org/I30147112","display_name":"Medical University of Sofia","ror":"https://ror.org/01n9zy652","country_code":"BG","type":"education","lineage":["https://openalex.org/I30147112"]}],"countries":["BG"],"is_corresponding":false,"raw_author_name":"Jivko Surchev","raw_affiliation_strings":["Department of Neurosurgery, Medical University, Sofia, Bulgaria","Department of Neurosurgery, Medical University, 1431 Sofia, Bulgaria"],"affiliations":[{"raw_affiliation_string":"Department of Neurosurgery, Medical University, Sofia, Bulgaria","institution_ids":["https://openalex.org/I30147112"]},{"raw_affiliation_string":"Department of Neurosurgery, Medical University, 1431 Sofia, Bulgaria","institution_ids":["https://openalex.org/I30147112"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5039894684"],"corresponding_institution_ids":["https://openalex.org/I24768866","https://openalex.org/I4210103918"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.14011228,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":93},"biblio":{"volume":"2","issue":null,"first_page":"212","last_page":"215"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10444","display_name":"Context-Aware Activity Recognition Systems","score":0.9684000015258789,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10444","display_name":"Context-Aware Activity Recognition Systems","score":0.9684000015258789,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10867","display_name":"Intensive Care Unit Cognitive Disorders","score":0.9563000202178955,"subfield":{"id":"https://openalex.org/subfields/2706","display_name":"Critical Care and Intensive Care Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/survivability","display_name":"Survivability","score":0.9332998991012573},{"id":"https://openalex.org/keywords/table","display_name":"Table (database)","score":0.5442992448806763},{"id":"https://openalex.org/keywords/fuzzy-logic","display_name":"Fuzzy logic","score":0.5170869827270508},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.45667099952697754},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.4524974226951599},{"id":"https://openalex.org/keywords/survival-analysis","display_name":"Survival analysis","score":0.44536417722702026},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.4170565605163574},{"id":"https://openalex.org/keywords/reliability-engineering","display_name":"Reliability engineering","score":0.37728363275527954},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.35095059871673584},{"id":"https://openalex.org/keywords/applied-mathematics","display_name":"Applied mathematics","score":0.3479219079017639},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.34443289041519165},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.3406601846218109},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.3031313419342041},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.14835825562477112}],"concepts":[{"id":"https://openalex.org/C2781133158","wikidata":"https://www.wikidata.org/wiki/Q1088669","display_name":"Survivability","level":2,"score":0.9332998991012573},{"id":"https://openalex.org/C45235069","wikidata":"https://www.wikidata.org/wiki/Q278425","display_name":"Table (database)","level":2,"score":0.5442992448806763},{"id":"https://openalex.org/C58166","wikidata":"https://www.wikidata.org/wiki/Q224821","display_name":"Fuzzy logic","level":2,"score":0.5170869827270508},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.45667099952697754},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4524974226951599},{"id":"https://openalex.org/C10515644","wikidata":"https://www.wikidata.org/wiki/Q543310","display_name":"Survival analysis","level":2,"score":0.44536417722702026},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.4170565605163574},{"id":"https://openalex.org/C200601418","wikidata":"https://www.wikidata.org/wiki/Q2193887","display_name":"Reliability engineering","level":1,"score":0.37728363275527954},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.35095059871673584},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.3479219079017639},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.34443289041519165},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.3406601846218109},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.3031313419342041},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.14835825562477112}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/is.2012.6335218","is_oa":false,"landing_page_url":"https://doi.org/10.1109/is.2012.6335218","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 6th IEEE INTERNATIONAL CONFERENCE INTELLIGENT SYSTEMS","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W1573924138","https://openalex.org/W1600382539","https://openalex.org/W1854752476","https://openalex.org/W1979300931","https://openalex.org/W2000331194","https://openalex.org/W2004328515","https://openalex.org/W2010490848","https://openalex.org/W2045337821","https://openalex.org/W2051451591","https://openalex.org/W2072024421","https://openalex.org/W2113857212","https://openalex.org/W2114262384","https://openalex.org/W2139629129","https://openalex.org/W2346811698","https://openalex.org/W2948602071","https://openalex.org/W4292295629","https://openalex.org/W4293241248"],"related_works":["https://openalex.org/W2387494004","https://openalex.org/W2162492390","https://openalex.org/W2350417149","https://openalex.org/W2036372418","https://openalex.org/W2545190132","https://openalex.org/W212597372","https://openalex.org/W2114587117","https://openalex.org/W2151533375","https://openalex.org/W2105280038","https://openalex.org/W2165219878"],"abstract_inverted_index":{"In":[0],"the":[1,33,36,61,70,74,77,80,95,98,110,126],"present":[2],"work":[3],"a":[4,45],"scheme":[5],"for":[6,60,86],"more":[7],"objective":[8],"comparison":[9],"of":[10,35,55,63,69,82,97],"patients,":[11],"represented":[12,101],"by":[13,16,102],"Kaplan-Meier":[14,75,103],"graphs,":[15],"classification":[17,31],"separating":[18],"them":[19],"in":[20,23,73,122,125],"groups":[21],"(m":[22],"number)":[24],"with":[25],"\"graded":[26],"survivability\"":[27],"is":[28,44,89,94,113],"proposed.":[29],"The":[30,41,117],"uses":[32],"apparatus":[34],"intuitionistic":[37],"fuzzy":[38],"sets":[39],"(IFS).":[40],"final":[42],"result":[43],"clear":[46],"and":[47,66,115,124],"easy":[48],"to":[49],"interpret":[50],"table.":[51],"To":[52],"avoid":[53],"loss":[54],"information,":[56,71],"as":[57,59],"well":[58],"obtainment":[62],"graded,":[64],"sound":[65],"real":[67],"evaluation":[68],"contained":[72],"graphs":[76],"authors":[78],"recommend":[79],"consideration":[81],"all":[83],"possible":[84],"cases,":[85],"which":[87],"it":[88],"fulfilled":[90],"n<;m,":[91],"where":[92],"n":[93],"number":[96],"patient":[99],"groups,":[100],"survivability":[104],"curves.":[105],"A":[106],"particular":[107],"case":[108],"from":[109],"neurosurgical":[111],"practice":[112,123],"considered":[114],"analyzed.":[116],"obtained":[118],"results":[119],"are":[120],"confirmed":[121],"scientific":[127],"literature.":[128]},"counts_by_year":[{"year":2021,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}